The new determination of the ηN S-wave scattering length from a three-channel, multi-resonance amplitude analysis

被引：63

作者：

Batinic, M ^{[1
]}

Dadic, I

Slaus, I

Svarc, A

Nefkens, BMK

Lee, TSH

机构：

[1] Rudjer Boskovic Inst, Zagreb, Croatia

[2] Univ Calif Los Angeles, Los Angeles, CA USA

[3] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA

来源：

PHYSICA SCRIPTA | 1998年 / 58卷 / 01期

关键词：

D O I：

10.1088/0031-8949/58/1/002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A three-channel multi-resonance, unitary model developed in 1995 is used to determine the pi N --> eta N and eta N --> eta N amplitudes by re-analyzing the available data on pi N elastic scattering and the weighted data for the pi N --> eta N total and differential cross sections. The input pi N elastic scattering amplitude in the S-11 channel has been improved, following suggestions of G. Hohler. Our new result of eta N scattering length, a(eta N) = (0.717 +/- 0.030) + i . (0.263 +/- 0.025) fm, suggests that the eta d system is unbound or loosely bound.

引用

页码：15 / 18

页数：4

共 17 条

[1]

[Anonymous], 1992, PI N NEWSLETTER

[2]

AQUILLARBENITZ M, 1992, PHYS REV D, V45, pS1

[3] A STUDY OF PI-NUCLEON S-WAVE RESONANCES AND THE ETA-NUCLEON INTERACTION [J].